Title (en)

METHOD AND APPARATUS TO ESTABLISH CONSTELLATIONS FOR IMPERFECT CHANNEL STATE INFORMATION AT A RECEIVER

Title (de)

VERFAHREN UND VORRICHTUNG ZUR ERSTELLUNG VON KONSTELLATIONEN FÜR UNVOLLSTÄNDIGE KANALZUSTANDSINFORMATION AN EINEM EMPFÄNGER

Title (fr)

PROCEDE ET APPAREIL PERMETTANT D'ETABLIR DES CONSTELLATIONS DESTINEES A DES INFORMATIONS D'ETAT DE VOIE IMPARFAITES AU NIVEAU D'UN RECEPTEUR

Publication

EP 1525685 A4 20050803 (EN)

Application

EP 03735862 A 20030529

Priority

• IB 0302088 W 20030529
• US 39308302 P 20020701

Abstract (en)

[origin: WO2004004172A1] The system and method utilize design criteria and construction for signal constellations in communication systems, such as cellular telephony, that have imperfect channel state information at the receiver. The system and method assume an imperfect knowledge of fading channel state information (600B) and statistics of channel fading (600D) are used to encode additional information into the space-time matrix signal constellation as variations in amplitude of constellation (600E) points. In the preferred embodiment space-time matrix constellations and design criterion are based on the Kullback-Leibler distance between conditional distributions.

IPC 1-7

H04B 15/00; H04L 27/10; H04L 27/22; H04L 1/06; H04L 27/34; H04L 1/00; H04L 27/00

IPC 8 full level

H04L 1/00 (2006.01); H04L 1/06 (2006.01); H04L 27/00 (2006.01); H04L 27/20 (2006.01); H04L 27/34 (2006.01); H04L 25/02 (2006.01)

CPC (source: EP US)

H04L 1/0003 (2013.01 - EP US); H04L 1/0618 (2013.01 - EP US); H04L 1/0625 (2013.01 - EP US); H04L 1/0631 (2013.01 - EP US); H04L 27/2078 (2013.01 - EP US); H04L 27/3405 (2013.01 - EP US); H04L 27/3416 (2013.01 - EP US); H04L 27/3472 (2013.01 - EP US); H04L 25/0202 (2013.01 - EP US); H04L 25/0212 (2013.01 - EP US)

Citation (search report)

• [X] DABAK A G ET AL: "Signal constellations for non-Gaussian communication problems", STATISTICAL SIGNAL AND ARRAY PROCESSING. MINNEAPOLIS, APR. 27 - 30, 1993, PROCEEDINGS OF THE INTERNATIONAL CONFERENCE ON ACOUSTICS, SPEECH, AND SIGNAL PROCESSING (ICASSP), NEW YORK, IEEE, US, vol. VOL. 4, 27 April 1993 (1993-04-27), pages 33 - 36, XP010110639, ISBN: 0-7803-0946-4
• [DX] BORRAN M J ET AL: "On design criteria and construction of non-coherent space-time constellations", PROCEEDINGS 2002 IEEE INTERNATIONAL SYMPOSIUM ON INFORMATION THEORY. ISIT 02. LAUSANNE, SWITZERLAND, JUNE 30 - JULY 5, 2002, IEEE INTERNATIONAL SYMPOSIUM ON INFORMATION THEORY, NEW YORK, NY : IEEE, US, 30 June 2002 (2002-06-30), pages 74 - 74, XP010601786, ISBN: 0-7803-7501-7
• [A] SOON-GHEE CHUA ET AL: "Variable-rate variable-power MQAM for fading channels", VEHICULAR TECHNOLOGY CONFERENCE, 1996. MOBILE TECHNOLOGY FOR THE HUMAN RACE., IEEE 46TH ATLANTA, GA, USA 28 APRIL-1 MAY 1996, NEW YORK, NY, USA,IEEE, US, vol. 2, 28 April 1996 (1996-04-28), pages 815 - 819, XP010162502, ISBN: 0-7803-3157-5
• [T] BORRAN M J ET AL INSTITUTE OF ELECTRICAL AND ELECTRONICS ENGINEERS: "Partiall.y coherent constellations for multiple-antenna systems", CONFERENCE RECORD OF THE 37TH. ASILOMAR CONFERENCE ON SIGNALS, SYSTEMS, & COMPUTERS. PACIFIC GROOVE, CA, NOV. 9 - 12, 2003, ASILOMAR CONFERENCE ON SIGNALS, SYSTEMS AND COMPUTERS, NEW YORK, NY : IEEE, US, vol. VOL. 1 OF 2. CONF. 37, 9 November 2003 (2003-11-09), pages 1007 - 1011, XP010702842, ISBN: 0-7803-8104-1
• [T] MICHAEL LEXA: "Useful Facts about the Kullback_Leibler discrimination distance", 2 December 2004 (2004-12-02), RICE UNIVERSITY, XP002331040, Retrieved from the Internet <URL:http://www.ece.rice.edu/~amlexa/publications/kl_properties.pdf> [retrieved on 20050609]
• See references of WO 2004004172A1

Designated contracting state (EPC)

AT BE BG CH CY CZ DE DK EE ES FI FR GB GR HU IE IT LI LU MC NL PT RO SE SI SK TR

DOCDB simple family (publication)

WO 2004004172 A1 20040108; AU 2003236945 A1 20040119; EP 1525685 A1 20050427; EP 1525685 A4 20050803; US 2006203941 A1 20060914

DOCDB simple family (application)

IB 0302088 W 20030529; AU 2003236945 A 20030529; EP 03735862 A 20030529; US 52316703 A 20030529